diff --git a/DOAN.Admin.WebApi/Controllers/MES/product/ProWorkorderController.cs b/DOAN.Admin.WebApi/Controllers/MES/product/ProWorkorderController.cs
index f60a6ca..ee70309 100644
--- a/DOAN.Admin.WebApi/Controllers/MES/product/ProWorkorderController.cs
+++ b/DOAN.Admin.WebApi/Controllers/MES/product/ProWorkorderController.cs
@@ -208,6 +208,10 @@ namespace DOAN.Admin.WebApi.Controllers
         [AllowAnonymous]
         public IActionResult WorkOrderExport([FromQuery] DateTime extportDate)
         {
+            if(extportDate==DateTime.MinValue)
+            {
+                return SUCCESS(null); 
+            }
             var list = _ProWorkorderService.WorkOrderExport(extportDate, new PagerInfo(1, 10000));
 
             var result = ExportExcelMini(list.Result, "workorder", "工单列表");
diff --git a/DOAN.Service/MES/product/ProWorkorderService.cs b/DOAN.Service/MES/product/ProWorkorderService.cs
index 2cb178f..355861b 100644
--- a/DOAN.Service/MES/product/ProWorkorderService.cs
+++ b/DOAN.Service/MES/product/ProWorkorderService.cs
@@ -502,6 +502,7 @@ namespace DOAN.Service.MES.product
         /// <returns></returns>
         public PagedInfo<ProWorkorder> WorkOrderExport(DateTime exportTime, PagerInfo pager)
         {
+            exportTime = exportTime.Date;
            return  Context.Queryable<ProWorkorder>().Where(it => it.WorkorderDate == exportTime).ToPage(pager);
         }